I think we can be sure it rose just from Disney's own statements on it.
In this
2020 lawsuit about ADA accommodation at its parks, the court found this data from Disney persuasive (emphasis mine):
In a two-week study conducted by Disney's Industrial Engineering team in April 2013, the team found that GAC pass usage at five of the most popular attractions at Disney (the "GAC Study") was much higher than the percentage of guests in the park who held a GAC pass.
At that time, approximately 3.3% of guests at Disney used a GAC pass, yet the percentage of guests on the most popular rides who had a GAC pass and entered through the FastPass line was significantly higher than 3.3%.
The GAC Study showed that 11% of riders on Space Mountain, 13% of riders on Splash Mountain, and 30% on Toy Story Mania used a GAC pass to access the ride.
Disney's industrial engineers concluded that the small portion of the guest population who held GAC pass was consuming a substantial portion of the ride capacity.
For example, guests with a GAC pass were riding Toy Story Mania an average of ten times more than guests who did not have a GAC pass.